Setup release automation

.github/actions/create-release-and-publish/action.yml

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+name: create-release-and-publish
+description: Create GitHub Release and publish somewhere
+inputs:
+  github-token:
+    description: 'GitHub Access Token for generating changelog'
+    default: ${{ github.token }}
+    required: true
+  run-publish:
+    description: 'Script for publishing'
+    required: true
+  get-version:
+    description: 'Script for extracting current version'
+    default: |
+      node --print 'require("./package.json").version'
+    required: true
+runs:
+  using: "composite"
+  steps:
+    - uses: ./.github/actions/release-meta
+      id: release-meta
+      with:
+        get-version: ${{ inputs.get-version }}
+
+    - name: Setup git
+      shell: bash
+      run: |
+        git config --global user.name 'github-actions[bot]'
+        git config --global user.email 'github-actions[bot]@users.noreply.github.com'
+        git remote set-url origin https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}
+      env:
+        GITHUB_TOKEN: ${{ inputs.github-token }}
+
+    - name: Update CHANGELOG.md
+      shell: bash
+      run: |
+        mkdir -p tmp
+        echo "${RELEASE_NOTE}" > tmp/CHANGELOG.head.md
+        git show ${{ github.base_ref }}:./CHANGELOG.md > tmp/CHANGELOG.base.md
+        cat -s tmp/CHANGELOG.head.md tmp/CHANGELOG.base.md > CHANGELOG.md
+        git add CHANGELOG.md
+        git commit -m "Update CHANGELOG for ${RELEASE_TAG}"
+        git push
+      env:
+        RELEASE_TAG: ${{ steps.release-meta.outputs.tag }}
+        RELEASE_NOTE: ${{ steps.release-meta.outputs.note }}
+
+    - name: Create GitHub Release
+      uses: actions/github-script@v4
+      with:
+        script: |
+          github.repos.createRelease({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            name: process.env.RELEASE_TAG,
+            tag_name: process.env.RELEASE_TAG,
+            body: process.env.RELEASE_NOTE,
+            prerelease: !/v\d+\.\d+\.\d+$/.test(process.env.RELEASE_TAG),
+            target_commitish: context.sha,
+          })
+      env:
+        RELEASE_NOTE: ${{ steps.release-meta.outputs.note }}
+        RELEASE_TAG: ${{ steps.release-meta.outputs.tag }}
+
+    - name: Publish to npm
+      shell: bash
+      run: ${{ inputs.run-publish }}
+
+    - name: Comment to PR
+      uses: actions/github-script@v4
+      with:
+        script: |
+          const url = `https://github.com/${context.repo.owner}/${context.repo.repo}/releases/tag/${process.env.RELEASE_TAG}`
+          github.issues.createComment({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            issue_number: context.issue.number,
+            body: `[${process.env.RELEASE_TAG}](${url}) is released 🚀`,
+          })
+      env:
+        RELEASE_TAG: ${{ steps.release-meta.outputs.tag }}

.github/actions/generate-changelog/action.yml

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+name: generate-changelog
+description: Generate and commit the CHANGELOG, and update the body of the Pull Request.
+inputs:
+  get-version:
+    description: 'Script for extracting current version'
+    default: |
+      node --print 'require("./package.json").version'
+    required: true
+runs:
+  using: "composite"
+  steps:
+    - uses: ./.github/actions/release-meta
+      id: release-meta
+      with:
+        get-version: ${{ inputs.get-version }}
+
+    - name: Update PR body
+      uses: actions/github-script@v4
+      with:
+        script: |
+          github.pulls.update({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            pull_number: context.issue.number,
+            title: `Release ${process.env.RELEASE_TAG}`,
+            body: process.env.RELEASE_NOTE,
+          })
+      env:
+        RELEASE_NOTE: ${{ steps.release-meta.outputs.note }}
+        RELEASE_TAG: ${{ steps.release-meta.outputs.tag }}

.github/actions/release-meta/action.yml

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+name: release-meta
+description: Output release metadata
+inputs:
+  github-token:
+    description: 'GitHub Access Token for generating changelog'
+    default: ${{ github.token }}
+    required: true
+  get-version:
+    description: 'Script for extracting current version'
+    default: |
+      node --print 'require("./package.json").version'
+    required: true
+outputs:
+  version:
+    description: 'Release version'
+    value: ${{ steps.meta.outputs.version }}
+  tag:
+    description: 'Release git tag'
+    value: ${{ steps.meta.outputs.tag }}
+  note:
+    description: 'Release note'
+    value: ${{ steps.meta.outputs.note }}
+runs:
+  using: "composite"
+  steps:
+    - id: meta
+      shell: bash
+      run: |
+        version=$(${{ inputs.get-version }})
+        note=$(npx --quiet lerna-changelog --next-version ${version})
+
+        echo "::set-output name=version::${version}"
+        echo "::set-output name=tag::v${version}"
+
+        note="${note//'%'/'%25'}"
+        note="${note//$'\n'/'%0A'}"
+        note="${note//$'\r'/'%0D'}"
+        echo "::set-output name=note::${note}"
+      env:
+        GITHUB_AUTH: ${{ inputs.github-token }}

.github/workflows/check-pr-labels.yml

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+name: Check PR Labels
+
+on:
+  pull_request_target:
+    types: [opened, labeled, unlabeled, synchronize]
+
+permissions:
+  pull-requests: write
+
+jobs:
+  check-labels:
+    if: ${{ !startswith(github.head_ref, 'releases/') }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: jesusvasquez333/verify-pr-label-action@v1.4.0
+      with:
+        github-token: '${{ secrets.GITHUB_TOKEN }}'
+        valid-labels: 'bug, enhancement, internal, documentation'
+        pull-request-number: '${{ github.event.pull_request.number }}'
+        disable-reviews: true  # use status

.github/workflows/publish.yml

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+name: Publish
+
+on:
+  pull_request:
+    branches:
+    - main
+    types: [closed]
+
+permissions:
+  contents: write
+  pull-requests: write
+  packages: write
+
+jobs:
+  publish:
+    if: github.event.pull_request.merged == true && startsWith(github.event.pull_request.head.ref, 'releases/')
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - uses: actions/setup-node@v1
+      with:
+        node-version: 14.x
+        registry-url: 'https://npm.pkg.github.com'
+
+    - run: yarn --frozen-lockfile
+
+    - uses: ./.github/actions/create-release-and-publish
+      with:
+        run-publish: |
+          yarn lerna publish from-package --yes
+        get-version: |
+          node --print 'require("./lerna.json").version'
+      env:
+        NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/release-pr.yml

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+name: Release PR
+
+on:
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  release-note:
+    if: startswith(github.head_ref, 'releases/')
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - uses: actions/setup-node@v1
+      with:
+        node-version: 14.x
+
+    - run: yarn --frozen-lockfile
+
+    - uses: ./.github/actions/generate-changelog
+      with:
+        get-version: |
+          node --print 'require("./lerna.json").version'

scripts/create-release-pr

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+#!/usr/bin/env bash
+
+set -eu
+set -o pipefail
+
+ROOT_DIR=$(dirname $0)/..
+
+yarn lerna version --no-git-tag-version
+
+version=$(node --print 'require("./package.json").version')
+branch="releases/${version}"
+
+git switch -c ${branch}
+git commit --all -m "Release ${version}"
+git push origin ${branch}
+
+gh pr create \
+  --base="main" \
+  --head="${branch}" \
+  --title="Release v${version}" \
+  --body="Release note will be generated automatically... ✍" \
+  --asignee="@me" \
+  --draft